|Title|Year|Peak chart positions US|Peak chart positions US R&B|Peak chart positions US Rap|Album|
|---|---|---|---|---|---|
|"Believe Me" (featuring Dave Patten)|2011|—|—|—|Non-album singles|
|"Ima Boss" (Remix) (featuring DJ Khaled, T.I., Rick Ross, Lil Wayne, Birdman and Swizz Beatz)|2011|51|—|—|Non-album singles|
|"House Party" (featuring Young Chris)|2011|—|45|24|Dreamchasers|
|"Wild Boy" (Remix) (MGK featuring Steve-O, 2 Chainz, Meek Mill, Mystikal, French Montana and Yo Gotti)|2012|—|—|—|Non-album singles|
|"My Nigga" (Remix) (YG featuring Lil Wayne, Rich Homie Quan, Meek Mill and Nicki Minaj)|2014|—|—|—|My Krazy Life|

Question: how many titles do not have an album?
Answer: 2